Orientation to build a correct class

[Gurzi]

Hello guys, at this moment i have 2 distinct classes, User and Product.

 

Now  i need a bunch of methods to list products( for example, products recently added, all the products, etc) .

 

Where shall i define this methods ? Inside the class User ? Product ? within a new Class?

 

Can you give me some advices ?

 

Thanks

[Daniel0]

Seeing as the methods are related to the products, logically they should be put in the Product class.

[mithras]

The user class represents (if instantiated) a specific user. The same for a product.

 

Why do you ask the user what the recent added products are? If it's a good design, the user cannot know this information. Actually it's the same for a product. Why should a product know what other products are recently introduced? The best you can use the controller design for this situation:

 

class productController{
  public function createProduct(){
    return new product();
  }

  public function getProducts(){
    $result = db::query( "SELECT * FROM products" );
    return $result->fetchArray();
  }

  public function getLatestProducts( $timespan = 3 ){
    $result = db::query( "SELECT * FROM products WHERE date > DATE_ADD( NOW(), INTERVAL -1 MONTH) ");
    return $result->fetchArray();
  }
}

class product{
  private $name;
  private $id;
}

Now you abstract the product from the controlling product methods.

[cngodles]

mithras:

 

You use the following in your example:

 

$result = db::query( "SELECT * FROM products" );

 

Is the db:query a common way to send a query, or is there additional code that goes along with that.

 

I myself have been coding PHP for 5 years, and I'm just now getting into OO PHP, and I'm trying to both grasp and justify it's use.

 

Thanks!

Clint